package cn.wolfcode.luowowo.website.resolver;

import cn.wolfcode.luowowo.cache.service.IUserInfoRedisService;
import cn.wolfcode.luowowo.member.domain.UserInfo;
import cn.wolfcode.luowowo.website.annotation.UserParam;
import cn.wolfcode.luowowo.website.util.CookieUtil;
import com.alibaba.dubbo.config.annotation.Reference;
import org.springframework.core.MethodParameter;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 自定义登录解析器
 */
public class UserInfoArgumentResolver implements HandlerMethodArgumentResolver {

    @Reference
    private IUserInfoRedisService userInfoRedisService;

    /**
     * 表示当前这个参数解析器，支持什么类型的方法参数 。。如MultipartFile
     * 此处支持类型：UserInfo
     * @param methodParameter
     * @return true表示支持该类型
     */
    @Override
    public boolean supportsParameter(MethodParameter methodParameter) {
        return methodParameter.getParameterType() == UserInfo.class && methodParameter.hasParameterAnnotation(UserParam.class);
    }

    /**
     * 上述方法为true后，在此执行参数解析逻辑
     * @param methodParameter
     * @param modelAndViewContainer
     * @param nativeWebRequest  web相关的东西
     * @param webDataBinderFactory
     * @return
     * @throws Exception
     */
    @Override
    public Object resolveArgument(MethodParameter methodParameter, ModelAndViewContainer modelAndViewContainer, NativeWebRequest nativeWebRequest, WebDataBinderFactory webDataBinderFactory) throws Exception {
       //获取当前登录对象，并返回，配置bean后  SpringMvc会自动注入
        HttpServletRequest request = nativeWebRequest.getNativeRequest(HttpServletRequest.class);
        HttpServletResponse response = nativeWebRequest.getNativeResponse(HttpServletResponse.class);
        String token = CookieUtil.getToken(request, response);
        UserInfo user = userInfoRedisService.getUserByToken(token);
        return user;
    }
}
